The predecessors of the Periodic Table.

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Across
  1. 4. The author of the earliest predecessor of the Periodic Table.
  2. 5. The table which organised chemical elements by the atomic weight.
Down
  1. 1. The author of the Periodic Table.
  2. 2. The author of the Table which organised chemical elements by atomic weight. .
  3. 3. The earliest predecessor to the Periodic Table.